Currently the export function will export ALL data every time, this not only wastes user bandwidth, disk I/O and local storage space, but also consumes more resources on the server.

Partial export should be a very basic and easy-to-implement feature. As I remembered, Onenote, Evernote and Notion, all of them can export partially. I'm pretty sure I can implement it by myself if Zoho gives developer API for Notebook or people can using web internal API will not cause related legal issues (such as making a self-use chrome extension).

Hope this option can be implemented as soon as possible, and not waiting two or three years like other feedback(ideas).